On Sat, Jul 23, 2011 at 5:53 PM, Jan-Erik Soderholm wrote: > I don't know about all programmers, but I'd *expect* any decent > programmer to do that. I've been using the Wisp628/648 programmers > for long and they does that. > > I see from the schematics in the PICkit2 manual that it has hardwired > 4.7 Kohm resistors to GND. So the target curcuit has to be able to > handle that at least, if one want to have the PICkit2 connected. > True trisate drivers might have been better. It is the same for PICkit 2, PICkit 3 and MPLAB ICD2 and MPLAB ICD 3, all have the 4.7K Ohm pull down resistor for PGC and PGD. PICkit 2 UG: http://ww1.microchip.com/downloads/en/DeviceDoc/51553E.pdf Section 4.3: "Debug Express requires 4.7k Ohm pull down resistors on ICSPCLK and ICSPDAT. Newer PICkit 2 units have a Red button and have the pull downs internally. Older PICkit 2 units have a Black button and require that the p= ull downs be added on the target board." So if you really do not need to use the debugger function, you can actually remove those two 4.7kOhm resistors. Ref: http://www.microchip.com/forums/tm.aspx?m=3D245280 Setup posters for other In Circuit Debuggers also mention the 4.7 kOhm pull-down resistors. PICKit 3: http://ww1.microchip.com/downloads/en/DeviceDoc/DS-51792B.pdf ICD 2: http://ww1.microchip.com/downloads/en/DeviceDoc/51265g.pdf ICD 3: http://ww1.microchip.com/downloads/en/DeviceDoc/DS-51765C.pdf Real ICE: http://ww1.microchip.com/downloads/en/DeviceDoc/51749B.pdf --=20 Xiaofan --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .